Chemistry: A Molecular Approach (3rd Edition)

by
Tro, Nivaldo J.

Chapter 8 - Sections 8.1-8.9 - Exercises - Problems by Topic: 65b

Answer

$[Ar]4s^{2}$$3d^{10}$$4p^{5}$
$[Ar]4s^{2}$$3d^{10}$$4p^{6}$ or $[Kr]$

Work Step by Step

Write the electron configuration for an uncharged Br atom. One electron must be added to Br to form the ion $Br^{-}$. Add this electrons to its energy level and change the corresponding electron configuration.